<template>
    <div>
        <!-- 面包屑区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
     <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
     <el-breadcrumb-item>权限管理</el-breadcrumb-item>
     <el-breadcrumb-item>角色列表</el-breadcrumb-item>
     </el-breadcrumb>

     <!-- 卡片视图 -->
     <el-card>
         <el-row>
             <el-col>
                 <el-button type="primary">添加角色</el-button>
             </el-col>
         </el-row>

         <!-- 角色列表区域 -->
        <el-table :data="roleList" border stripe>
          <!-- 展开列 -->
          <el-table-column type="expand">
            <template slot-scope="scope">
              <el-row  :class="['bdbottom',i1 ===0 ? 'bdtop':'', 'vcenter']"  v-for="(item1, i1) in scope.row.children" :key="item1.id">
                <!-- 渲染一级权限 -->
                <el-col :span="5">
                  <el-tag closable @close="removeRightsById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <!-- 渲染二级和三级权限 -->
                <el-col :span="19">
                  <!-- 通过FOR循环渲染二级权限 -->
                <el-row :class="[i2 ===0 ? '' : 'bdtop', 'vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id" >
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightsById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightsById(scope.row, item3.id)"> {{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
                </el-col>
              </el-row>

            </template>
          </el-table-column>
          <!-- 索引列 -->
          <el-table-column type="index"></el-table-column>

          <el-table-column label="角色名称" prop="roleName"></el-table-column>
          <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
          <el-table-column label="操作" width="300px">
            <template slot-scope="scope">
              <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
              <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
              <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
            </template>
          </el-table-column>


        </el-table>
     </el-card>

     <!-- 分配权限对话框 -->
     <el-dialog
    title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClose">
     <!-- 树行控件 -->
     <el-tree :data="rightlist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
     <span slot="footer" class="dialog-footer">
     <el-button @click="setRightDialogVisible = false">取 消</el-button>
     <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
</el-dialog>
    </div>
</template>
<script>
export default {
  data() {
    return {
    // 所以角色列表数据
      roleList: [],
      //  控制分配权限对话框的隐藏于显示
      setRightDialogVisible: false,
      rightlist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点
      defKeys: [],
      //  权限的角色id
      roleID: ''
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    // 索取所有角色列表
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败！')
      }
      this.$message.success('获取角色列表成功')
      console.log(res.data)
      this.roleList = res.data
    },
    //  根据ID删除对应的权限
    async removeRightsById(role, rightId) {
      // 弹框提示是否要删除
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除')
      }
      //  删除请求
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除失败！')
      }
      this.$message.success('删除成功')
      role.children = res.data
    },
    //  展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleID = role.id
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败')
      }
      this.rightlist = res.data
      //  获取要勾选的节点
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归形式获取节点
    getLeafKeys(node, arr) {
      // 当前节点不包含children属性，则是第三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听权限对话框的关闭事件
    setRightDialogClose() {
      this.defKeys = []
    },
    // 点击，分配权限
    async allotRights() {
      const keys = [...this.$refs.treeRef.getCheckedKeys(), ...this.$refs.treeRef.getHalfCheckedKeys()]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleID}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('分配权限成功')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px  solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
